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Match the Column (I) and (II)....

Match the Column (I) and (II).

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The correct Answer is:
a- q; b-p; c- r; d-s
(a) Total No. of stereoisomers = `2^n`, When molecule is unsymmetrical.
(b) When molecule is symmetrical, total no. of stereoisomers
(I) When n = even
Total isomers = `2^(n-1) + 2^(n//2-1)`
(II) When n = odd.
Total isomers = `underset("optically active")(2^(n - 1) - 2^((n-1)//(2)) + underset("meso")(2^((n-1)//(2))`
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